Connector Pin Assignments E-1
Appendix EConnector Pin Assignments
This appendix describes the connector pinout assignments for the Model XM128 ISDN Digital
Modem.
The Model XM128 modem features one RJ-45 ISDN connector and two RJ-11 phone connectors.
The RJ-45connector labeled ISDN-S or ISDN-U is for an ISDN line connection (S/T interface or
U interface), and the RJ-11 connectors labeled PHONE 1 and PHONE 2 (also known as analog
adapters in European countries) are for an optional connection to analog telephone e quipment such
as a telephone, fax, or analog modem.

RJ-45 Plug and Connector

The RJ-45 plug and RJ-45 connector are both illustrated in FigureE-1.
Figure E-1. RJ-45 plug and RJ-45 connector
7894FA
18
12345678